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1、 Unit 2 There are forty students in our class.Lesson 9 Grade FourLets sing.Lets chant. 1.five ten fifteen twenty ( )2.three six nine twelve ( ) 3. seven fourteen twenty-one ( ) 找规律找规律 猜数字！猜数字！twenty-fivefifteentwenty-eight 11 22 4488 9910101020202020302030fiftythirtyfortythirteenfourteenfifteen t i
2、t i:n Lets chant.How many boys are there in the room ?Thirty ! Thirty ! Thirty !How many girls are there in the room?Forty ! Forty ! Forty !How many students are there in the room?Fifty ! Fifty ! Fifty !Lets chant.Do exercises.Homework:1. Write the new sentences and words.2. Prepare a new dialogue, and act it next time.
